Methods and devices for sending or receiving routing information, and system for processing routing information

Abstract

Provided are methods and devices for sending or receiving routing information and a system for processing routing information. The method for sending routing information includes that: a Device-to-Device (D2D) communication management entity sends, to User Equipment (UE), routing information used for D2D communication. The problem that there is no solution applicable to relay communication of D2D UE with other D2D UE in a routing information manner in the related technology is solved, and a solution to communication between the D2D UE based on the routing information is further provided.

1 . A method for sending routing information, comprising:
 sending to User Equipment (UE), by a Device-to-Device (D2D) communication management entity, routing information used for D2D communication.   
     
     
         2 . The method as claimed in  claim 1 , before sending, by the D2D communication management entity, the routing information to the UE, further comprising:
 generating, by the D2D communication management entity, the routing information according to state information of the UE, wherein the state information is used for indicating a neighbouring relationship and/or link condition information between the UE and neighbouring UE.   
     
     
         3 . (canceled) 
     
     
         4 . The method as claimed in  claim 1 , wherein the UE comprises relay UE, wherein the relay UE is determined by the D2D communication management entity according to a capability of the UE and a position of the UE in a network topology connection relationship, and/or, is determined by information configured before communication; the relay UE is divided into following types: a first type of relay UE which is UE located on an edge in the network coverage and responsible for transmitting information in the network coverage to UE outside of network coverage, the information comprising control information and/or data information; and a second type of relay UE which is UE responsible for forwarding information when all UE is outside of network coverage, the information comprising control information and/or data information. 
     
     
         5 . The method as claimed in  claim 1 , wherein the D2D communication management entity comprises one of:
 an eNB, a Mobility Management Entity (MME), a Proximity Service (ProSe) server, a central control node, a group master in a D2D communication group and a cluster head.   
     
     
         6 . The method as claimed in  claim 2 , under a condition that the UE under network coverage forwards data through an eNB, after generating, by the D2D communication management entity, the routing information, the method further comprising:
 sending, by the D2D communication management entity, the routing information to the eNB.   
     
     
         7 . The method as claimed in  claim 1 , further comprising: updating, by the D2D communication management entity, the routing information after receiving at least one of following updating information:
 updating information, sent by the UE, about change of UE information;   updating information, sent by the UE, about change of a neighbouring relationship and/or link state information between UE;   updating information, sent by an Evolved Packet Core (EPC), about change of the neighbouring relationship between the UE;   updating information, sent by an eNB, about change of an air interface resource; and   updating information, sent by a Core Network (CN) where an eNB is located, about change of a backhaul resource load;   wherein the updating information is sent to the D2D communication management entity in an incremental manner or a complete manner.   
     
     
         8 . (canceled) 
     
     
         9 . The method as claimed in  claim 7 , wherein the updating information is periodically reported by at least one of the UE, the eNB and a location server of the EPC, and/or, is reported according to an indication of the D2D communication management entity. 
     
     
         10 . The method as claimed in  claim 7 , under a condition that the UE is under network coverage and/or partially under the network coverage, the method further comprising: updating, by the D2D communication management entity, the routing information according to a routing strategy, wherein the routing strategy comprises at least one of:
 cellular network communication preferred, D2D communication preferred and path condition sensing;   under a condition that all UE is outside of network coverage, the method further comprising: updating, by the D2D communication management entity, the routing information according to a routing strategy, wherein the routing strategy comprises: path condition sensing.   
     
     
         11 . (canceled) 
     
     
         12 . The method as claimed in  claim 1 , wherein the routing information comprises:
 an Identity (ID) of a sending node of the UE and an ID of a next-hop node, wherein the next-hop node comprises UE and/or an eNB, the ID of the sending node of the UE comprises: a UE ID, and the ID of the next-hop node comprises: a UE ID and/or an eNB ID; the UE ID comprises: a mobile user ID, an Internet Protocol (IP) address, a logical username, a Temporary Mobile Subscriber Identity (TMSI), an International Mobile Subscriber Identity (IMSI), a Radio Network Temporary Identity (RNTI), or other ID used for UE identification; and the eNB ID comprises: a global eNB ID, a logical eNB name and/or an eNB label.   
     
     
         13 . The method as claimed in  claim 12 , wherein the routing information further comprises at least one of:
 network coverage condition information of the sending node of the UE and a communication mode between the sending node of the UE and the next-hop node.   
     
     
         14 . The method as claimed in  claim 2 ,
 before generating, by D2D communication management entity, the routing information, the method further comprising: receiving, by the D2D communication management entity, the state information sent by the UE in one of following manners:   under a condition that the D2D communication management entity is an eNB, UE under network coverage sends the state information to the D2D communication management entity, and/or, the state information sent by UE outside of network coverage is forwarded to the D2D communication management entity through a first type of UE, which is under the network coverage, in the UE;   under a condition that the D2D communication management entity is an MME or a ProSe server, an eNB sends the state information sent by UE under network coverage to the D2D communication management entity, and/or, the eNB and a first type of relay UE, which is under the network coverage, in the UE forward the state information sent by UE outside of network coverage to the D2D communication management entity; and   under a condition that all UE is outside of network coverage, UE directly neighbouring to the D2D communication management entity among the UE sends the state information to the D2D communication management entity, and/or, a second type of relay UE in the UE forwards, to the D2D communication management entity, the state information sent by UE which is not directly neighbouring to the D2D communication management entity;   and/or,   before generating, by the D2D communication management entity, the routing information, the method further comprising:   receiving, by the D2D communication management entity, the state information of the UE from an EPC;   and/or,   before generating, by the D2D communication management entity, the routing information, the method further comprising:   acquiring, by the D2D communication management entity, information of multiple eNBs and state information of UE related to each eNB in the multiple eNBs, wherein the information of the multiple eNBs comprises: information of the multiple eNBs and their neighbouring eNBs and information of UE under network coverage of each eNB; the UE related to each eNB in the multiple eNBs comprises: the UE under the network coverage of each eNB, UE which is outside of network coverage but is reachable through forwarding of a first type of relay UE under the network coverage of each eNB;   wherein the D2D communication management entity generates the routing information according to the state information of the UE and the information of the multiple eNBs.   
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         17 . The method as claimed in  claim 14 , wherein, under a condition that the D2D communication management entity is an MME, one eNB in the multiple eNBs or a ProSe server, acquiring, by the D2D communication management entity, the state information of the UE and the information of the multiple eNBs comprises:
 receiving, by each eNB in the multiple eNBs, the state information of the UE under respective network coverage, and/or, receiving, by each eNB in the multiple eNBs through a first type of relay UE under respective network coverage, the state information, which is forwarded by the first type of relay UE, of UE outside of network coverage, and sending, by each eNB in the multiple eNBs, the state information of each UE and the information of the multiple eNBs to the D2D communication management entity;   wherein under a condition that the D2D communication management entity is one eNB in the multiple eNBs, the D2D communication management entity receives the state information of the UE related to each eNB and the information of the other eNBs through X2 interfaces with the other eNBs in the multiple eNBs and/or an S1 interface between the eNB and a CN.   
     
     
         18 . The method as claimed in  claim 2 , wherein, under a condition that the UE forwards data through an eNB, generating the routing information comprises:
 establishing a network topology connection relationship between the UE and the eNB according to the state information of the UE and information of the eNB; and   generating the routing information according to the network topology connection relationship.   
     
     
         19 . The method as claimed in  claim 2 , wherein, under a condition that all UE is outside of network coverage and/or eNBs do not participate in data forwarding, generating the routing information comprises:
 establishing a network topology connection relationship among multiple pieces of UE according to the state information of the multiple pieces of UE; and   generating the routing information according to the network topology connection relationship.   
     
     
         20 . The method as claimed in  claim 2 , wherein the state information of the UE is determined according to at least one of: feedback of the other UE about receiving conditions of discovery signals sent by the UE to the other UE in the UE, signals received by the UE from the other UE, and position information, acquired from the location server of the EPC, of the UE. 
     
     
         21 . (canceled) 
     
     
         22 . The method as claimed in  claim 6 , wherein a manner for the D2D communication management entity to send the routing information to the UE and/or the eNB comprises one of manners as follows:
 under a condition that the D2D communication management entity is an eNB, the D2D communication management entity sends the routing information to UE under the network coverage and/or the eNB, and UE outside of network coverage acquires the routing information by forwarding of a first type of relay UE under the network coverage;   under a condition that the D2D communication management entity is an MME or a ProSe server, the D2D communication management entity sends the routing information to a serving eNB of the UE, then the serving eNB of the UE sends the routing information to the UE, and furthermore, a first type of relay UE in the UE forwards the routing information to UE outside of the network coverage; and   under a condition that all UE is outside of network coverage, the D2D communication management entity sends the routing information to UE directly neighbouring to the D2D communication management entity, and/or, the D2D communication management entity sends the routing information to the UE which is not directly neighbouring to the D2D communication management entity through a second type of relay UE in the UE.   
     
     
         23 . The method as claimed in  claim 2 ,
 wherein the D2D communication management entity generates or updates the routing information according to a request of the UE and/or eNB, and/or, the D2D communication management entity actively generates or updates the routing information, wherein the D2D communication management entity sends the updated routing information to the UE and/or the eNB in an incremental notification manner or a complete notification manner.   
     
     
         24 . (canceled) 
     
     
         25 . The method as claimed in  claim 1 , under a condition that one piece of UE in the UE initiates D2D communication according to the received routing information, further comprising:
 receiving, by the D2D communication management entity, a traffic starting indication sent by the UE initiating the D2D communication; and   updating routing information of a relay node related to D2D communication of the UE initiating the D2D communication according to the traffic starting indication, wherein the relay node comprises: relay UE in the UE and/or the eNB.   
     
     
         26 . The method as claimed in  claim 25 , wherein
 the traffic starting indication comprises: an address of a destination node of traffic; or,   the traffic starting indication comprises: the address of the destination node of the traffic and a duration of the traffic.   
     
     
         27 . The method as claimed in  claim 25 , after updating the routing information of the relay node, further comprising:
 receiving, by the D2D communication management entity, a traffic ending indication sent by the UE initiating the D2D communication; and   stopping sending, by the D2D communication management entity, the updated routing information to the relay node related to the D2D communication according to the traffic ending indication.   
     
     
         28 . The method as claimed in  claim 6 , under a condition that one piece of UE in the UE needs to forward data through an eNB, after the eNB receives the data, the method further comprising:
 judging, by the eNB, whether UE receiving the data is in a Discontinuous Reception (DRX) state or not; and   under a condition that a judgment result is that the UE receiving the data is in the DRX state, forwarding, by the eNB, a data packet to the UE receiving the data within a next on duration/active time of the UE receiving the data.   
     
     
         29 . The method as claimed in  claim 6 , under a condition that at least one piece of UE in the UE sends a data packet to UE served by an eNB through the eNB, the method further comprising:
 judging, by the eNB, whether there is UE in a DRX state among all UE under network coverage of the eNB or not;   under a condition that a judgment result is that there is UE in the DRX state, sending, by the eNB, a group communication prenotice through a Physical Downlink Control Channel (PDCCH) within an on duration/active time of the UE in the DRX state; and   under a condition that all UE served by the eNB enters a continuous reception state, sending, by the eNB, the data packet to the UE served by the eNB by group communication.   
     
     
         30 . The method as claimed in  claim 29 , wherein the eNB configures a same DRX parameter to the UE under the network coverage of the eNB. 
     
     
         31 . A method for receiving routing information, comprising:
 receiving from a D2D communication management entity, by User Equipment (UE), routing information used for Device-to-Device (D2D) communication.   
     
     
         32 . The method as claimed in  claim 31 , before receiving, by the UE, the routing information, further comprising:
 acquiring, by the D2D communication management entity, state information of the UE from the UE and/or a location server of an Evolved Packet Core (EPC), wherein the state information is used for indicating a neighbouring relationship and/or link condition information between the UE and neighbouring UE, and the routing information is generated by the D2D communication management entity according to the state information.   
     
     
         33 . The method as claimed in  claim 31 , after receiving, by UE, the routing information, further comprising:
 performing, by the UE, D2D communication according to the routing information, wherein UE initiating communication judges whether D2D communication is able to be performed with corresponding UE or not according to the received routing information, and under a condition that a judgment result is that the D2D communication is able to be performed with the corresponding UE, the UE initiating communication initiates D2D communication to the corresponding UE, wherein the D2D communication comprises one of manners as follows: unicast communication, group communication and broadcast communication.   
     
     
         34 . The method as claimed in  claim 33 , wherein, under a condition that the UE performs D2D communication according to the routing information and an address of a destination node of a data packet received by a first type of relay UE or a second type of relay UE in the UE is not an address of the first type of relay UE or the second type of relay UE, the first type of relay UE or the second type of relay UE forwards the data packet according to an Identity (ID) of a next-hop node and/or a communication mode between the first type of relay UE or the second type of relay UE and the next-hop node in the routing information. 
     
     
         35 . The method as claimed in  claim 34 , wherein the communication mode is contained in the routing information, or, is determined according to the ID of the next-hop node, wherein a D2D communication manner is adopted when the next-hop node is UE, and a cellular communication manner is adopted when the next-hop node is an Evolved Node B (eNB). 
     
     
         36 . The method as claimed in  claim 31 , under a condition that the number of pieces of UE neighbouring to the first type of relay UE or the second type of relay UE in the UE is more than or equal to 2, after receiving, by the first type of relay UE or the second type of relay UE, the routing information from the D2D communication management entity, the method further comprising:
 receiving, by the first type of relay UE or the second type of relay UE, D2D communication forwarding table information sent by the D2D communication management entity, wherein the D2D communication forwarding table information is used for indicating processing of the first type of relay UE or the second type of relay UE over the received data packet in group communication and/or broadcast communication.   
     
     
         37 . The method as claimed in  claim 36 , wherein, under a condition that the first type of relay UE or the second type of relay UE is not directly neighbouring to the D2D communication management entity, the first type of relay UE or the second type of relay UE receives the D2D communication forwarding table information through UE directly neighbouring to the D2D communication management entity and/or an eNB. 
     
     
         38 . The method as claimed in  claim 36 , wherein the D2D communication forwarding table information comprises: a D2D communication address, a communication mode and a latest data packet index. 
     
     
         39 . The method as claimed in  claim 36 , wherein the D2D communication forwarding table information is generated by the D2D communication management entity according to a preset strategy, wherein the preset strategy comprises at least one of: cellular communication preferred, D2D communication preferred and path condition sensing. 
     
     
         40 . The method as claimed in  claim 39 , wherein the D2D communication forwarding table information generated according to the preset strategy of cellular communication preferred comprises: D2D communication forwarding table information used for local routing of an eNB, and/or, D2D communication forwarding table information used for routing through a Core Network (CN). 
     
     
         41 . The method as claimed in  claim 40 , under a condition that the D2D communication forwarding table information comprises the D2D communication forwarding table information used for local routing of the eNB and the D2D communication forwarding table information used for routing through the CN, before group communication and/or broadcast communication of the first type of relay UE or the second type of relay UE, the method further comprising:
 determining, by the first type of relay UE or the second type of relay UE, D2D communication forwarding table information used for group communication and/or broadcast communication according to path weights of the D2D communication forwarding table information used for local routing of the eNB and the D2D communication forwarding table information used for routing through the CN.   
     
     
         42 . The method as claimed in  claim 36 , wherein, after the first type of relay UE or the second type of relay UE receives the D2D communication forwarding table information, processing, by the first type of relay UE or the second type of relay UE, the received data packet according to the D2D communication forwarding table information comprises:
 judging, by the first type of relay UE or the second type of relay UE, whether the received data packet is consistent with a preset characteristic or not, wherein the preset characteristic comprises that: an address of the destination node of the data packet is a group communication/broadcast communication address, and an index of the data packet is a latest data packet index in the D2D communication forwarding table information or the index of the data packet has yet not appeared in the D2D communication forwarding table information;   under a condition that a judgment result indicates that the data packet is consistent with the preset characteristic, analyzing the received data packet; and   forwarding the received data packet according to a communication mode, indicated in the D2D communication forwarding table, between the first type of relay UE or the second type of relay UE and the destination node.   
     
     
         43 . The method as claimed in  claim 42 , under a condition that the judgment result indicates that the data packet is inconsistent with the preset characteristic, processing, by the first type of relay UE or the second type of relay UE, the received data packet according to the D2D communication forwarding table information further comprises:
 discarding, by the first type of relay UE or the second type of relay UE, the received data packet.   
     
     
         44 . The method as claimed in  claim 42 , after forwarding, by the first type of relay UE or the second type of relay UE, the received data packet, the method further comprising:
 updating, by the first type of relay UE or the second type of relay UE, the data packet index in the D2D communication forwarding table information.   
     
     
         45 . The method as claimed in  claim 34 , under a condition that a UE communication node topology relationship changes, further comprising:
 receiving, by the first type of relay UE or the second type of relay UE, updating information of the D2D communication forwarding table information from the D2D communication management entity.   
     
     
         46 . The method as claimed in  claim 45 , wherein change of the UE communication node topology relationship comprises at least one of:
 disappearance of a UE communication node and addition of a UE communication node.   
     
     
         47 . The method as claimed in  claim 31 , wherein the routing information is sent by the D2D communication management entity according to a request of the UE, and/or, the routing information is actively sent by the D2D communication management entity. 
     
     
         48 . A device for sending routing information, located in a Device-to-Device (D2D) communication management entity, comprising:
 a first sending component, configured to send, to User Equipment (UE), routing information used for D2D communication.   
     
     
         49 . A device for receiving routing information, located in User Equipment (UE) supporting Device-to-Device (D2D) communication, comprising:
 a receiving component, configured to receive, from a D2D communication management entity, routing information used for D2D communication.   
     
     
         50 . A system for processing routing information, comprising: a device for sending routing information which is located in Device-to-Device (D2D) communication management entity, and the device for receiving routing information which is located in User Equipment (UE) as claimed in  claim 49 , wherein the device for sending routing information comprises a first sending component, configured to send, to the UE, routing information used for D2D communication.